Improvement in boilers for steam-heaters



w.'s PAY-NE. BOILERS FOP. STEAM-HEATERS.

N 171,344,- Patented Jan.4,1876

'mvzntoaz NJETERS. FHDTU-UTHOGRAPMER, WASHINGTON. D. C.

UNITED STATES PATENT QFFIGE.

WALTER s. PAYNE, or sT. LOUIS, MISSOURI.

IMPROVEMENT IN BOILERS FOR ST-EAM-HEATERS.

Specification forming part of Letters Patent No. 111,844, dated January 4,1876; application filed December 11, 1875. 4 v

To all whom it may concern:

Be it known that I, WALTER S. PAYNE, of the city and county of St. Louis, and State of Missouri, have invented a new and useful [inprovement in Boilers for Steam-Heaters, which improvementv is fully set forth in the following specification, reference being bad to the accompanying drawing.

Mfimprovement consists, first, in the construction of the boiler proper; secondly, in the combination of such boiler and a base-burning fuel-trunk and, thirdly, in a device for regulating-the fire by the steam-pressure.

The boiler consists of an upper and a lower annular tube, connected by upright tubes, and

' the upper one of these circular tubes is connected to a water-reservoir above, whose upper part forms the steam-chamber. The water and steam chamber has a central orifice,

in which is supported the fuel trunk or cylinder, whose lower end is elevated the proper distance above the fire-grate to constitute an ordinary base-burning arrangement.

7 At the top of the steam-chamber is a steamvessel, divided horizontally into two chambers by a flexible spring-diaphragm, upon whose center rests-a piston-rod connected to a lever, whose outer end carries a pulley, with a cord passing over it. The ends of the cord are fastened, respectively, to the dampers of I apertures communicating between the outer air and the ash-pit and tire-chamber, respectively; the arrangement being such that a pressure of steam above that desired first closes the ash-pit damper, and shuts oii' the supply of air beneath the grate, and a further increase of pressure opens the tire-chamber dampers, admitting cold air into the fire-chamb'er above the fire. v

Figure 1 is an axial fore-and-aft section. Fig. 2 is a horizontal section at a; as, Fig. l.

A shows the furnace-casing. B is the ashpit O, the ash-pit door. D is the hearth. E is the fire-pot, and F is the circular fire-grate,

- supported upon pivots f f in the pot. ()ne of the pivots is extended outside the casing, and ends in a cross-bar to give means for tilting or shaking the grate, which has, besides its tilting movement, a capacity for horizontal oscillation as it is shaken, by movement of the hand-rod f from side to side. Toallow this movement of the grate and rod the latter passes through a horizontal slot in the case A, which slot is'closed by a sliding plate, f through which the rod passes. G is the lower rin g-tube ot'the boiler, resting upon the hearth outside the fire-pot. The ring 9 is cast with sockets g, for the reception of the lower ends of the upright pipes H, connected at the upper ends by similar sockets i with the upper ring-tube I. This latter tube has vertical branches J leading upward to the water-reservoir and steam-chamber K. In the central part of the reservoir K is a vertical circular opening, through which passes the fuel cylinderor trunk L, provided with acover, L. The fuel-cylinder extends the proper distance downward, to leave space for the fire at its lower end.

Supposing the duty required of the boiler I to be light, the bottom of the cylinder L would be made to extend low down in the boiler, leaving small height of fire-space between it and the grate; but supposing the duty to be large, a greaterheight of fire-space would be required.

This adjustment of fire-space would usually be made by casting the cylinder longer or shorter, as might be required; but the cylinder L may be made adjustable vertically, to accomplish the above object.

M is the chimney. At top of the water and steam chamber K is a steam vessel or cylinder, N, containing a piston or a flexible springdiaphragm, upon which the piston-rod 0 rests, the arrangement being such that the pistonrod 0 is raised by the steam pressing beneath the diaphragm or piston.

When a piston is used in place of a springdiaphragm, a spring would be required to check the ascent of the piston-rod, so that its ascent would be proportionate to -the steampressure. The piston-rod rises against the under side of a lever, P, fulcrumed at Q. The moving end of the lever P carries a pulley. B, over which passes a cord or chain, S. One end, 8, of this chain is attached to the arm t of the hinged damper T, which, when raised,-

closes the air-opening U, leading into the ashair-opening Wwhen it is down. The opening W leads into the fire-chamber abovethe hearth. i

The arrangement 'is such that the upward movement of the lever P first closes the damper T, so as to check the fire by shutting off its supply of air beneath, and a further rise of the lever will open the damper'V tocool the fire-chamber.

There may be two or more of eaclrclass of dampers '1 and V so connected together as to be operated by the same chain b or S, respectively. The lever P is not a necessary part of the device, as the pulley B may be attached directly to the piston O.

I have shown my preferred arrangement, in which I use a lever, P, to get an increased movement of the pulley, and to locate it in a suitable position over thedamper-arms.

Yis the steam-pipe leading to the steamheaters in the building, and Zisthe mum;

pipe, through which the water of condensation returns to the boiler. The pipe Y or the reservoir K may have a safety-valve.

I claim as my'invention- 1. The boiler composed ofalowerand an up per annular tube, G and ;I, with connecting pipesH, steam and water chamber K, and connecting-pipeswJ, substantially as set forth.

2. The combination of boiler G H I J K and fuel-cylinder L, substantially as set forth.

3. The combination of pistou-rodOfrising withthe steam-pressure, pnlleyR, cord or chain S, and dampers T and V, operating substantially as set forth.

t WALTER -S. PAYNE.

Witnesses: t a

SAML. KNIGHT,

H. HUTGHINS. 

